Abstract: A seamless playback method using a bookmark, and an apparatus and a system therefore are disclosed. The seamless playback method using the bookmark receives, from one of a prior device and a prior server, the bookmark comprising playback information on the prior device which had previously played back contents, enables the device to set the playback information for playing back the contents on the basis of the playback information of the prior device, and can play back, from a resumed playback time point, the contents and additional contents corresponding to the set playback information on the basis of the set playback information. Thus, the contents stopped during a playback process of the device can be continuously and automatically played back in the same playback setting as the device using another device.

Abstract: Disclosed are a method and device for receiving content. The method for receiving content is performed by a client device, acquires a plurality of source access information by searching a plurality of sources storing selected content, generating at least one q request including a plurality of source access information, selecting one of source access information among a plurality of source access information based on at least one q request, and receives the selected content by using the selected source access information. Therefore, the content can be received by selecting a content source, which is effectively transmitting the content, or the content source based on the invention of a user among a plurality of content sources.

Abstract: A method and apparatus for seamless playback of content and apparatus are provided. The method includes: discovering, by a second device, a first device which is currently playing back a content in response to a seamless playback request; requesting the first device to transmit a property set related to a currently played back asset; and seamlessly playing back the content on the basis of the property set transmitted from the first device. Accordingly, a content can be seamlessly played back between devices through various types of downloads or streaming handovers in an open content market environment which supports device compatibility and a cross-service between heterogeneous services.